Alan, I think that the concept for single length would apply separately for irons and woods. Can you re-run the numbers using say a 42" club length for woods with a 100 MPH swingspeed (I guess head weight would be around 220 grams). I think the target weight is closer to 266 grams for these heads, with the length at 36.6-37.5", depending on the golfer and the shaft used. Can Max's program predict how much difference in swingspeed and/or distance one would get between a 38" club with a 253g head and a 37" club with a 266g head, assuming the same loft?
Tedd -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Alan Brooks Sent: Tuesday, January 04, 2005 7:46 PM To: ShopTalk@mail.msen.com Subject: Re: ShopTalk: Re: [SpinetalkersForum] Single length irons Since it was easy to do I just ran Max Dupilka's Trajectory program for an 80-mph, 250-g club head at various lofts. The distances I got are as follows: Loft Distance (yards) 12 175 24 178 36 138 48 100 Reasonable numbers for lofts above 24*. It looks like it would take lighter heads (hence higher club head velocities) to get the distance back up with woods. The trajectory for the the 24*, 36*, and 48* lofts were comparably high. The 12* trajectory was about half the height. I did not play with the other parameters in Max's software (such as spin) that will influence true results. Interesting, though. Alan Brooks At 04:37 PM 1/4/2005 -0500, you wrote: >>Dave T. has done the math >>comparing single length iron distances vs. traditional irons, and there >>really is a minimal affect on distance by going to single length (at say >>37"). > >Sometime, I'll have to re-do it with a different set of assumptions. The >graph in the Club Design Notes assumes you couldn't get a set with >constant head weight. I assumed a skilled golfer that could still hit the >ball with wildly different swingweights, and who in fact got some clubhead >speed advantage with the lighter clubs. (I used data from Cochran & Stobbs >to estimate the speed advantage.) > >To evaluate the concept that Tim (or David Lake of 1IronGolf) is pushing, >I'd re-do the simulations for constant head weight and constant speed. I >don't know if it would make single-length look better or worse. Longer >irons would have lower clubhead speed but higher mass; don't know if the >resulting momentum and energy transferred comes out higher or lower. Just >gotta go ahead and crank through the numbers. > >Very interesting, though! >DaveT > > >-- >No virus found in this outgoing message. >Checked by AVG Anti-Virus. >Version: 7.0.296 / Virus Database: 265.6.8 - Release Date: 1/3/05 >
